Michael l



(No Model.) M. L. FLYNN & A. F. BULL.

SPARK ARRESTBR, GONDUUTOR, AND CONSUMER.-

No. 310,039. Patented Dec. 30, 1884'.

WITNESSES I I a NrTED STATES LATENT Erich,

MICHAEL L. FLYNN AND ALBERT F. BULL, OF ST. THOMAS, ONTARIO,

' CANADA.

SPARK ARRESTER, CONDUCTOR, AND CONSUMER.

SPECIFICATION forming part of Letters Patent No. 310,039, dated December 30, 1884.

Application filed September 3, I894. (Yo model.)

.210 61/ whom, it mayconcern:

Be it known that we, MICHAEL L. FLYNN and ALBERT F. BULL, of St.Thomas, Province of Ontario, Canada, have invented a new and useful Improvement in Spark Arresters,.0onductors, and Consumers; and we do hereby declare the following to be a full, clear, and exact description of the same, such as will'enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a partof this specification.

Our invention consists of the combinations of devices and appliances hereinafter specitied, and more particularlypointed out in the claims.

Our invention relates to an improvement in spark arrestcrs, conductors, and consumers.

Heretofore spark arresters and conductors of various forms have been devised, some for conveying the sparks beneath the train, others for directing them over and back of the train, and others for precipitating the sparks and cinders into a receptacle at the base of the smoke-stack, from which receptacle they may be emptied as opportunity permits. It is the object of our invention to collect the sparks and cinders that are carried forward with the draft before the same reach the smoke-stack and to force them back into the fire-box, the construction of the return-pipe being such that it curves forward and downward through abrick 'arch or diaphragm above the fuel in the firebox, for the purpose of somewhat uniformly spreading or distributing the returned sparks over the surface of the fuel, thereby insuring the complete and perfect consumption of the cinders.

In the drawings, Figure I is alongitudinal vertical section of a locomotive illustrating our invention. Fig. 2 is a plan view of the same. Fig. 3 is an end view illustrating a funnel or hopper shaped construction for directing the sparks to the entrance of the returning-pipe. Fig. 4 is a separate View of the steam-jet and injector mechanism.

In carrying out our invention, A represents the fire-box of a locomotive-boiler; B, its tubular flues; 0, its smoke-box.

D is a diaphragm, such as is ordinarily employed in locomotives for intercepting the sparks and cinders that are carried forward by the draft,and directs them onto the bottom of the smoke-box, so as not to pass out of the stack.

E is an arch in the fire-box, such as is usually employed in locomotives, and designed to check the direct draft from the fuel-bed into the fines, causing the products of combustion to remain longer in the fire-box and to per form good service upon the walls of the waterleg before entering the fines. The result is a more perfect consumption of the fuel and a better utilization of the heat.

We will now proceed to describe the particular features of our invention.

F is a tube or conduit leading from the smoke-box into the fire-box. Its mouth F 'is curved forward and downward through the brick arch or diaphragm in such manner that the returned cinders are somewhat uniformly spread or distributed over the surface of the fuel, thereby insuring the perfect consumption of the cinders, and at the same time avoiding the use of an inclined shield over the discharge end of the cinder-pipe in the fire-box to defleet the cinders.

F is an opening for the admission of cinders and sparks.

I* is a nozzle, connected to a pipe, f. This pipe taps the steam-space of the boiler, and is governed by a valve located at any suitable point,.so as to be readily operated by the engineer; or, instead of being connected with the steam-space of the boiler, it may be connected with the exhaust-passages, and so arranged as to intercept a sufficient amount of the exhaust-steam to effect the desired purpose. It will be observed that this open head F and nozzle F constitute an injector.

The operation of the device will now be understood. Sparks or cinders having been thrown forward onto the floor of the smokebox are caught up by the suction created by this injector F F, and are forced forward and delivered from the mouth F into the fire-box to be consumed.

The bottom of the smoke-box may be left in its usual condition, though we prefer that a suitable funnel be constructed, as shown at G, which shall serve to direct the sparks or cinders down to the entrance F of the injector.

In the construction shown in the drawings the injector-tube is made in continuation of one of the tubular flues of the boiler, so that the tubular flue shall constitute a part of the pipe F. This construction is not essential, and it might be objectionable, owing to the constant abrasion of the interior surface by passing the sparks and cinders back through the fine. We would therefore have it understood that we may continue the pipe F through one of the said fines instead of making the fine a part of the pipe. It is not essential that this injector-pipe should pass back within the boiler, as shown, for it may be made to pass out from the smoke-box, along the outside of the boiler, and thence into the fire-box. There may be one or more of these spark-injectors employed in the same boiler. Where we have employed them we have used a single one with very good effect. It is thus seen that not only are the sparks and cinders precipitated into the bottom of the smoke-box, but by our invention they are here caught up and returned to the firebox, and thrown onto the fire in such a manner as to consume them. Again,the heated air and gases, which are also caught up by the injector, are passed forward,

thoroughly combined with oxygen furnished by the steam-jet, and when the mass is discharged over the fire it furnishes not only fuel for consumption, but oxygen to aid combustion in the fire-box, thus constituting an effectual smoke-consumer. The apparatus becomes, therefore, a spark arrester, conductor, consumer, and smoke-consumer combined.

\Ve prefer always to use a steam-siphon or steam-injector for returning the sparks; but it is apparent that the same object may be accomplished by a suction-fan located in the smoke-box; or other means may be devised for producing a suction from the smoke-box, and for driving the sparks back to the firebox.

We are aware that it is not new to extend a pipe from an injector in the smoke-box back to the fire-box for returning the cinders to the fuel for consumption, and such, therefore, we do not broadly claim.

. We are also aware that a water-diaphragm above the fuel in the fire-box of a locomotive is not new; but such isnot our invention.

What we claim is 1. The combination of the fire-box A, the

brick arch or diaphragm E therein,the smokebox 0, the injector opening into the smoke box, and the tube F, extending from the injeotor, and having its rear discharge end, F, curved forward and downward through the brick arch or diaphragm to spread or distribute the cinders over the surface of the fuel, substantially as described.

2. The combination of the fire-box A, the brick arch or diaphragm E therein',thesmokebox 0, the diaphragm D, arranged in the latter, the injector located at the base of the smoke-box and opening thereunto, and the tube F, extending from the injector, and having its discharge end F turned forward and downward through the brick arch or diaphragm to spread or distribute the cinders uniformly over the surface of the fuel, substantially as described.

In testimony whereof we sign this specification in the presence of two witnesses.

MICHAEL L. FLYNN. ALBERT F. BULL.

W'itn esses:

E. M. GARWOOD, E. HORTON. 

